【摘要】 为提高对残留在环境中诺氟沙星的降解率，通过一步煅烧法制备一种稻壳生物炭类石墨相氮化碳（g-C₃N₄）复合光催化剂，并采用多种方式对其结构进行表征，通过C原子取代g-C₃N₄晶格中的桥接N原子，有效构建离域π键系统，显著增强其对诺氟沙星的光催化降解性能.实验结果表明，优化的生物炭g-C₃N₄复合光催化剂的光降解速率常数最高可达0.029 4 min^-1,对诺氟沙星的降解率在2 h内提升至85.45%,是纯g-C₃N₄材料的1.46倍.本文为开发高效、稳定的水处理光催化剂提供了新的设计思路，展示了生物炭g-C₃N₄复合材料在环境修复领域的应用潜力.更多还原

【Abstract】 In order to improve the degradation rate of norfloxacin residues in the environment, we prepared a rice husk biochar based graphite phase nitrogen doped carbon（g-C₃N₄） composite photocatalyst through a one-step calcination method. We characterized its structure by using various methods, substituting the bridging nitrogen atoms in the g-C₃N₄ lattice with carbon atoms to effectively construct a delocalized π-bond system, significantly enhancing its photocatalytic degradation performance of norfloxacin. Experimental results show that the photocatalytic degradation rate constant of the optimized biochar g-C₃N₄ composite photocatalyst can reach up to 0.029 4 min^-1, and the degradation rate of norfloxacin can be increased to 85.45% within 2 h, which is 1.46 times that of pure g-C₃N₄ material. This article provides novel design concept for developing highly efficient and stable photocatalysts for water treatment, demonstrating the application potential of biochar g-C₃N₄ composite materials in the field of environmental remediation.更多还原